stressor | restored sites available | data before/after restoration available | stressor gradient available | comments |
eutrophication | yes | yes | yes | TotP, total N, orthophoshate concentrations |
hydromorphological degradation | yes | yes | yes | alteration of natural riparian habitats |
organic pollution | yes | yes | yes | represented by BOD5, ammonium and nitrates |
general degradation | yes | yes | yes | EQR of invertebrates, EQR of macrophytes |
hydrologic stress (e.g. impoundment, flow velocity reduction, hydropeaking, water abstraction, flow velocity increase, etc.) | yes | yes | yes | flow alteration ratio (abstraction/no abstraction) |